Headstock for a general utility machine tool



Aug. 23, 1938.

E. R. LOCHMAN 2,127,745 HEADSTOCK FOR A ('iEH ERAL UTILITY MACHINE TOOL Originl Filed Sept. 50, 1952 3 Sheets-Sheet l lli INVENTOR.

Emu. IE. LOCHMAN BY m,m m

ATTORNEYS.

1938. E. R. LOCHMAN 2,127,745

HEADSTOCK FOR A GENERAL UTILITY MACHINE TOOL Original Filed Sept. 30, 1932 3 Sheets-Sheet 2 III/111111541111 INVENTOR. EMIL I2, Locum/m A TTORNEYS.

Aug. 23, 1938. E. R. LOCHMAN 2,127,745

HEADSTOCK FOR A GENERAL UTILITY MACHINE TOOL Original Filed Sept. 30, 1952 3 Sheets-Sheet 3 F JO.

IN V EN TOR.

Emu. R. Lou-IMAM A TTORNEYS.

Patented Aug. 23, 1938 2,127,145

UNITED STATES PATENT orgies HEADSTOCK FOR A GENERAL UTILITY MACHINE Tool.

M Emil R. Lochman, Milwaukee, Wis.

Original application September 30, 1932, Serial No. 635,535. Divided and this application July 29, 1936, Serial No. 93,888

W 21 Claims. (01. 82--28) This invention relates to a headstock for a eral organization of the tool reference is made to general utility machine tool. The present applithe above Patent 2,050,347. The tool frame comcation is a division of my Patent 2,050,347 on a prises a bed B upon which the tool slide S and the General utility machine tool, granted August 11, headstock H are individually adjustable to and all 1936. from each other. 5

One of the objects of the invention is to pro- The headstock H will now be described. The vide a headstock having a standard adjustable main body I81 has guideways I95 at the bottom as to height, upon which the driving motor is fitting the rails 25 of the bed B, as Well as their mounted for movement on a bed unitarily with inner edges 21, see Fig. 2, on which the headq'o the headstock, and for adjustment both vertistock is adjustably mounted by capscrews I88 encally and pivotally. gaging bars I89 into which they are tapped for Other objects of the invention relate to the mounting. provision of a special driving arrangement from The upper part of the body terminates in the such a motor to the headstock spindle, the mospindle casing I85'having a bore I8I and coun- 115 tor armature shaft being provided with pulleys terbores 294 and I24 into which the cups Ill or stepcones at both ends upon which a single and I24 of the roller bearings 294, 295 are pressed, driving belt is readily interchangeable and used the inner races of said roller bearings being for direct as well as back gear driving. pressed onto the spindle II8 as shown. The oil A further object of the invention includes the retainers I22, I23 are also pressed lightly into provision of exchangeable spindle units, in which their respective places, so they retain the lubri- 20 hollow spindles of larger or smaller diameter fit eating oil for their respective bearings in a manthe same headstock, each carrying its own reher to circulate through the rollers; then the spective driving gear and sheave and being adadjusting nut I25 is screwedon the reduced and justable axially as well as interchangeable with threaded rear end of the spindle H8 and tight- ;25 other spindles. ened until all lost motion is taken out of the 25 Another object of the invention is to provide spindle, then the setscrew I26 is tightened and a headstock spindle having a permanent chuck the spindle is ready to run.

-.carrying the driving means for the spindle, and One of the new features of this spindle is the in which a system of long adjustable centers may permanent chuck forming its head. While the &30 be mounted. I outside of same has a screw thread for holding 30 In the accompanying drawings: other chucks, pulleys or the like, the rear end of Figure 1 is a side elevation of a complete masaid permanent chuck carries the combination chine, embodying my invention as it appears sheave and gear H4, H6 for direct as Well as when setup for drilling. back-gear driving of said spindle. Said perma- 5 Figure 2-.is' a top view of the machine. nent chuck II3 has a double jaw H4 and the Figure 3 is an end View thereof. operating screw H3 and is preferably forcibly Figure 4 is a view partially in plan and parscrewed onto the reduced front end I20 of the tially in horizontal section of the headstock spinspindle H8, and said chuck and spindle have an dle' and back gear drive, with associated bearaccurately machined bore throughout of the limit .10 ings and related parts of the headstock. capacity of said chuck, for receiving bar or pipe 40 Figure 5 is a view similar to Figure 4, showing stock, held for operations by said chuck, or for a different spindle and bore. holding the long center bars, for alining, spotting Figure 6 is a top plan view of the headstock, or holding work for various operations. Said with parts broken away to show the motor adchuck is self-centering and is further used for as justment. holding drills, reamers and other tools.

. Figure '7 is a side elevational fragmentary view The front of the headstock is reinforced by the of the headstock. large flange I96 on which the gearcasing H5 is Figure 8 is a fragmentary side elevation of the mounted, covering the large gear IIS as well as entire. apparatus, showing a long centering bar the pinion Ill, the latter being mounted on shaft with chuck and drill for horizontal boring, I46, passing through the eccentric bearing Ml, of 50 mounted in the headstock spindle. the eccentric I40 which is pivotally mounted in Figures!) and 10 are similar views in side elebearings I45 and has a flange I 40, provided with vation, showing the device set up for turning bar a handle I4I, which, when in upright position as stock and heavier work, respectively. shown in Figs. 3 and 4, brings the pinion II! For a more particular description of the genin engagement with the gear H6, and when in 55 dotted position it turns the eccentric for disengaging said pinion from said gear, in which position the nose 219 strikes the face 280 for a stop.

A socket I43 is bored into the wall of the bearing I receiving the spring I44 and on top of it the ball I42 which the spring holds in the countersinks I42 provided for each position of said handle I4I retaining it in its set positions, by yielding contact. Fig. 5 shows said pinion and related parts out of engagement with the gear II6. Figure 5 further illustrates the exchangeable spindle unit for the headstock H, fitting the same bore I3 I but having the roller bearings 294, 295 removed, however retaining their respective cups I2I, I24 of hardened ground steel. This arrangement provides the space for the spindle I3I with its larger diameter and larger bore, for handling bar and pipe stock of considerable diameter.

A spindle nose I30 is forcibly screwed on. the spindle I3I and forms part of it, having the same diameter as the chuck I I3, and carrying the same combination sheave and gear H4, H6; the cone I29 preferably of hard bronze is also firmly mounted on the spindle and forms part of it, and the adjusting nut I2! is screwed on the rear end of said spindle, and meshing with the taper cup I21 is adjusted to take out endplay and lost motion of the spindle, while the bore I3I forms the main bearing of it. A large chuck I 32 having jaw screws I33 and jaws I34 with gripping faces I39 holds the stock I35; it further has a double sheave I38 cast onto the rear part of its body, and a threaded hub fitting the thread I30 of the spindle nose. Said chuck has a hole fitting the bore of the spindle for passing and centering the stock having the same size, it has the regular drive as the spindle II8, but in addition thereto is provided with said double sheave I38 which registers with the double sheave I58 carried by motor I and its shaft I59 and is for the purpose of furnishing a double belt, powerful direct drive to suit the capacity for larger stock handled by said chuck. The stepcone I48 is mounted on the rear end of shaft I46 and meshes with the stepcone I5I providing four differing driving speeds for the back gear or pinion I IT.

The reversing motor I 50 is mounted on the adjustable platform I 64 having a bracket I6I, pivotally mounted on the lug I66 by the pivot I65, said lug being cast on the end of the supporting tube I60 which has a slotted hole I68 through which the adjusting screw I68 extends and is tapped into the bracket I61 and has a reduced inner section holding the compression spring I'I0 against the inner wall of tubing I60, so that said adjusting screw I68 may be set to give proper spring tension to the driving belt I49 connecting said stepcones I5I, I48. The entire motor is further adjustable vertically and pivotally by thus adjusting its supporting tube I60 whose lower edge rests on the screw I6I (see Figs. 1 and 3) tapped through the lug I62 and held in its adjusted position by nut I63. For pivotal adjustment as required for the non-reversible motor I50, the round vertical socket 282 furnishes the bearing for the supporting tube I60 to which the collar H9 is mounted and on which the handle I80 having a nose I8I fitting into suitable slots I8I is holding said motor I50 in its position shown in Fig. '7 for driving the back gear.

In Fig. 6 the motor and its stepcone are shown in dotted position I5I, as is the handle I80 for connecting with the direct drive sheaves I 83, I83, of which the sheave I83 is screwed onseparately and has a slot 298 to still reach the operating screw I I3 of the permanent chuck II3.

It will be noted that in either position said motor I50 turns the spindle in the customary direction of arrow 296 required for a right hand drill 29?, and it only requires lifting of said handle I80 turning on its pivot I82 to lift the nose I8I out of its socket, give the motor its required half turn with said handle and drop it in the opposite slot I8I. A further slot I8I is provided for giving the motor only a quarter turn, so a belt may be run to any apparatus held on the crossbeam 55, or other locations.

The non-reversible motor I50 is lower priced, as is the common on and off switch I16 with its turning knob I11; and said switch is mounted on the flange I76 forming part of collar I'I9 as shown in the sectional view in Fig. 6, (see lines 66 of Fig. 7).

The line wire I18 supplies the electric current to said switch, from which it is transferred to the motor I50 by the connecting wire I'I5. Figs. 1, 2 and 3 show the reversible motor I50 with its connecting socket I52 from which the cable I53 leads to the reversing switch I54, and said switch is supplied with electric current by the line cable I56, so that said motor may be driven right or left hand, for either back gear or direct driving by switching the handle I55 from its shown off position either to the right, or to the left. Said switch I54 is suitably mounted on the supporting tube I60, so that for assembling or shipping said motor I 50 may be mounted on its platform I64 and properly wired and connected to said switch, and this motor unit being all assembled on said tube I60, is then lifted out or inserted into the vertical socket 282, is vertically adjusted by the screw I6I for the proper length and tension of the driving belt, and then looked in its proper position by the lock nut I63.

Said hollow storage section I90 of the headstock H, by opening said door I86, also furnishes access to said adjusting screw I6I.

In Fig. 3 the movable jaw 20 and other parts are irregularly broken away to best bring out the construction of the headstock and its related parts, leaving the spindle out entirely and showing only a small section of gear II6 to show its meshing with the pinion H1.

The rest unit R may be used in turning the barstock or may be set up as a tailstock when the device is used for turning heavy work. The barstock 230 is simply guided in the rest R and is mounted in the tubular headstock spindle like the removable center pin 92 normally used therein.

When used as a part of the tailstock it supports a centering pin 92, the work being centered by pins 92 and 92' and driven from the face plate 286 and dog 266. The work illustrated at 264 is a heavy pulley, but other heavy work may be handled in like manner.

I claim:

1. In a machine of the character described, the combination with a headstock standard having a telescopically extensible portion, of a spindle journaled in said standard, a motor carried by said portion, driving connections from the motor to the spindle, and a bed provided with a guideway upon which said standard is movable unitarily with said motor and connections.

2. In a utility machine tool, the combination with a bed, of a headstock standard movable thereon and provided with spindle bearings, a spindle journaled in said bearings, an adjustable extension carried by said standard for movement unitarily therewith upon said bed, a motor carried by said extension and vertically and pivotally adjustable thereon, and driving connections carried by said standard for transmitting motion from said motor to said spindle.

3. In a machine of the character described, the combination with a headstock provided with bearings, of a spindle rotatable in certain of said bearings, an intermediate shaft rotatable in others of said bearings and operatively connected to saidspindle, a motor mounted on said headstock above said bearings, and means for alternatively connecting said motor with opposite ends of said spindle and intermediate shaft re spectively.

i. In a machine of the character described, the combination with a headstock providing bearings for adjacent spindle and intermediate shafts, of spindle and intermediate shafts respectively mounted in said bearings and operatively interconnected, achuck on the spindle, a pulley connected with the chuck, a pulley connected with the opposite end of the intermediate shaft, and a motor adjustably supported on the headstock and provided with means including a belt interchangeably adapted for connecting said motor alternatively with either of said pulleys.

5. In a machine of the character described, the combination with a headstock and a spindle rotatable therein, said headstock being provided with a tubular socket at right angles to the spindle, of a headstock motor provided with a mounting post adjustable in said socket, and driving means operatively connecting said motor and spindle.

6. A device of the character described including a headstock provided with spindle and intermediate shaft bearings, of a spindle and shaft rotatable in said bearings and provided With driving pulleys at opposite ends, a tubular socket connected with said headstock and extending at right angles to said bearings, a mounting post rotatably and axially adjustable in said socket, and a motor mounted on said post and provided With a pulley registerable upon rotation of said post with the pulleys of said spindle and shaft respectively.

7. In a machine of the character described, the combination of a support for shafts of differing sizes, said support having a bore sufficiently large to receive the shaft of maximum diameter, axially spaced bearing races mounted in said support at the ends of said bore, and shafts interchangeably receivable in said bore and respectively provided with different types of bearings coacting with said races.

8. In a machine of the character described, the combination of a support for shafts of differing sizes, said support having a bore sufficiently large to receive the shaft of maximum diameter, axially spaced bearing races mounted in said support at the ends of said bore, and shafts interchangeably receivable in said bore and respectively provided with different types of bearings coacting with said races, the larger of said shafts having bearing means relatively fixed thereto coacting with said races, and the smaller of said shafts having anti-friction bearings mounted thereon and engageable with the same races.

9. In a device of the character described, the combination with a tubular spindle and a chuck fixed to the end thereof and aligned with the opening therethrough, of an extension spindle 1 depending slidable throughthe-bore of said first mentioned zspindle and'enga'geable by said chuck to fix its axial position therein.- I

10. In a machine of the character described,

a headstock comprising a hollow body section provided with a door opening, driving means adjustable with reference to said section, and adjusting means housed within said section and accessible througlrsaid door opening.

11.111 a general purpose machine, a motor mounting unit comprising-a column, a mounting head at the end of the column, a platform pivotally mounted on-said head and having a lug, an adjusting screw passing through said lug and provided with a shoulder, and a spring bearing against the inner wall of the column seated against said shoulder Whereby to tend to oscillate said plate about its fulcrum, said platform comprising a motor support upon which the compression of said spring will adjust said motor in a belt tightening direction.

12. In a machine of the character described, the combination witha headstock provided with bearings, of a spindle rotatable in certain bearings thereof, an intermediateshaft rotatable in others of said bearings, a headstock extension adjustable with respect to the headstock, a motor mounted on said extension, connections for the primary actuation either of said spindle or said intermediate shaft from said motor, and connections for the operation of said spindle from the intermediate shaft when the intermediate shaft is primarily actuated'.

13. In a machineof the character described, the combination with a headstock provided with a plurality of shafts, driving means connecting said shafts, pulleys mounted on said shafts at opposite ends thereof, a headstock extension adjustable with respect to the headstock, a motor mounted on the extension, and driving pulley means carried by said motor and adapted for belt connection selectively with the pulleys of the respective shafts, whereby either shaft may be primarily driven, at least one of said shafts comprising a machine tool spindle,

14. In a machine of the character described, the combination with a headstock provided with a plurality of shafts, driving means connecting said shafts, pulleys mounted on said shafts at opposite ends thereof, a headstock extension adjustable With respect to the headstock, a motor mounted on the extension, and driving pulley means carried by said motor and adapted for belt connection selectively with the pulleys of the respective shafts, whereby either shaft may be primarily driven, at least one of said shafts comprising a machine tool spindle, said motor being mounted for pivotal movement in a direction to reverse it end for end, whereby to facilitate the driving of the shafts in either direction.

15. In a general purpose machine tool, the combination with a headstock and a driving shaft carried thereby, of a back shaft mounted on the headstock, said driving shaft having pulleys at both ends and said back shaft having complementary pulley means at one end, a spindle connected with the back shaft and having pulley means complementary to the pulleys at the other end of the driving shaft, the pulley means of the back shaft and spindle being at like center distances from the pulleys of the driving shaft, whereby interchangeably to employ a single belt.

16. In a general purpose machine tool, the combination with a headstock and a driving shaft carried thereby, of a back shaft mounted on the headstock, said driving shaft having pulleys at both ends and said back shaft having complementary pulley means at one end, a spindle connected with the back shaft and having pulley means complementary to the pulleys at the other end of the driving shaft, the pulley means of the back shaft and spindle being at like center distances from the pulleys of the driving shaft, whereby interchangeably to employ a single belt, said spindle being tubular and extending through the headstock and provided with a face plate and jaws adjustable with respect thereto for engagement with a tool or work to position it in the tubular spindle.

17. In a machine of the character described, the combination with a headstock and a spindle rotatable therein, said headstock being provided with a generally upright mounting post, of a headstock motor adjustably mounted on said post for movement with respect to said spindle, and driving means operatively connecting said motor and said spindle.

18. In a machine of the character described, the combination with a headstock and a spindle rotatable therein, said headstock being provided with a generally upright mounting post, of a motor supported by said post, means for vertical adjustment of said motor with respect to said spindle, means for fixing said motor in a predetermined adjustment, and driving means operatively connecting said motor and spindle.

19. In a machine of the character described, the combination with a headstock and a spindle rotatable therein, a plurality of pulleys operatively connected with said spindle for the operation thereof, a generally upright mounting post carried by said headstock, a motor mounted on said post and provided with a driving pulley, and means for bodily shifting said motor in a direction to adjust its pulley about said post to positions for registration with the several pulleys aforesaid, and a belt for alternatively driving the one or the other of said spindle actuating pulleys from said motor pulley.

20. In a machine of the character described, the combination with a headstock and a spindle rotatable therein, said headstock being provided with a generally upright mounting post, of a motor mounted on said post and provided with a driving pulley, a driven pulley on said spindle, belt means normally connecting said pulleys for the driving of said spindle, and means whereby said motor is bodily rotatable on said post, whereby to move the motor pulley out of a position for registration with said driven pulley.

21. In a machine of the character described, the combination with a headstock, a spindle rotatable therein and a second shaft mounted for rotation, said spindle and second shaft being each provided with driven pulleys, of a generally upright mounting post carried by said headstock, a headstock motor supported by said mounting post and provided with a driving pulley and a belt for alternative connection with the pulleys of said headstock and said second shaft respectively, and means whereby said motor is adjustable on said post to operative driving positions with respect to said driven pulleys.

EMIL R. LOCHMAN. 

